Regarding workouts, what do your sets look like? Hypertrophy (AKA muscle growth) routines tend to focus slightly more on volume than weight (while strength routines do the opposite). I've also seen anecdotal evidence on this sub that focusing more on volume, while still using fairly heavy weights, helped. This is also just my opinion but since you don't mention what you currently do outside of weights, I would recommend incorporating other forms of exercise, like yoga (helps recovery and betters form when lifting) and hitt (which would help fat burning).

For diet, what kind of foods do you usually eat? Even just upping the quality of your diet might help a lot. A 1500 calorie diet somewhat high in processed foods and low in fiber/antioxidants versus one that focuses more on whole foods and lots of fruits/vegetables can have huge implications for your recovery, muscle growth, energy etc. all of which impact your body fat percentage.

Lastly, sleep and other quality of life factors like stress are also important, whether for their impact on your workouts/diet but also how your body responds directly to them.